反应详情

Chloroacetaldehyde (50% solution in water) (0.705 ml) was added to a solution of amino amide from Example 55 (1.5 g) in methanol (15 ml). After 10 minutes hydrochloric acid (0.77 ml of a 50% solution in methanol) was added. Solid sodiumcyanoborohydride (0.317 g) was added and the mixture stirred at ambient temperature for two days. The solvent was removed under reduced pressure, the residue was dissolved in dichloromethane (50 ml) and washed with aqueous sodium hydrogen carbonate (3×50 ml). The organic extracts were dried over magnesium sulphate, filtered and concentrated under reduced pressure. The crude product was purified by silica gel chromatography eluting with hexane:diethylether (1:1) to give the title compound as a yellow solid (1.13 g).

1. customThe solvent was removed under reduced pressure
2. dissolutionthe residue was dissolved in dichloromethane (50 ml)
3. washwashed with aqueous sodium hydrogen carbonate (3×50 ml)
4. dry with materialThe organic extracts were dried over magnesium sulphate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe crude product was purified by silica gel chromatography
8. washeluting with hexane:diethylether (1:1)